Backlight assembly for liquid crystal display apparatus

ABSTRACT

Disclosed is a backlight assembly ( 500 ) for an LCD apparatus. The backlight assembly ( 500 ) includes a light guide plate ( 300 ) for emitting a light in two directions ( 325, 335 ) and a brightness control member ( 400 ) for controlling brightness ratio of the light emitted in the two directions. Accordingly, the LCD apparatus may display images in the two directions, which are same to each other or different to each other using the brightness control member ( 400 ).

TECHNICAL FIELD

The present invention relates to a backlight assembly and an LCD (LiquidCrystal Display) apparatus, and more particularly to a backlightassembly for emitting a light in multiple directions, capable ofdisplaying image information in two directions different to each otherand an LCD apparatus having the same.

BACKGROUND ART

In general, an LCD apparatus displays an image using a liquid crystal inwhich a light transmittance varies with an intensity of an electricfield. The LCD apparatus has a flat shape having a thickness from anumber of millimeters to dozens of millimeters including a liquidcrystal layer that a thickness is no more than a number of micrometers.

The LCD apparatus is widely used as a communication device such as acellular phone and as a display device such as a mobile computer or adesktop computer and so on.

The LCD apparatus employing a method that displays the image in only onedirection had been developed to reduce a thickness and a volume thereof.Recently, the LCD apparatus has been developed to display a same imageor a different image in two directions.

In order to display the image in the two directions, the LCD apparatusincludes a reflecting plate for dividing the light into the twodirections and an LCD panel having a polarizing filter, a pixelelectrode, a liquid crystal, two electrodes facing each other, a glasssubstrate, a polarizing plate. The LCD apparatus further includes a flattype light emitting part for emitting the light in opposite twodirections and a display cell disposed on both surfaces of the lightemitting part. The LCD apparatus further includes a backlight assembly,a first LCD panel and a second LCD panel disposed on both surfaces ofthe backlight assembly, respectively.

The LCD apparatus divides the light so as to display the image in theopposite two directions, however, the LCD apparatus cannot control theintensity of the light divided into the opposite two directions.

As an example of a display device which needs to control the intensityof the light, a cellular phone having an external display device and aninternal display device will be described. For example, if a cellularphone of model “A” has an external display device having a brightnesslower than that of an internal display device thereof, most of lightsemitted from a light source are provided to the internal display device.Also, if a cellular phone of model “B” has an external display devicehaving a brightness higher than that of an internal display devicethereof, most of lights emitted from the light source are provided tothe external display device.

As aforementioned above, the LCD apparatus may divide the light into theopposite two directions, however, the LCD apparatus may not variablycontrol the amount of the light divided into the opposite two directionsaccording to an external situation.

DISCLOSURE OF THE INVENTION

The present invention provides a backlight assembly capable of dividinga light into two lights having a different brightness and supplying thedivided lights in two directions.

The present invention also provides an LCD having a backlight assemblycapable of dividing a light into two lights having a differentbrightness and displaying images same or different to each other in twodirections.

In one aspect of the invention, there is provided a backlight assemblyfor emitting a light in two directions, comprising: a light guide platehaving a light incident surface for changing a first light input frombetween a first display area and a second display area into a secondlight, a first light emitting surface for emitting a portion of thesecond light to the first display area as a third light and a secondlight emitting surface for emitting a remained portion of the secondlight to the second display area as a fourth light, the light guideplate being disposed between the first and second display areas; and abrightness control part for reflecting a portion of the fourth light tothe first display area and transmitting a remained portion of the fourthlight to the second display area, so that a first brightness at thefirst display area and a second brightness at the second display areahave a predetermined brightness ratio, respectively.

In another aspect, there is provided a backlight assembly for emitting alight in two directions, comprising: a lamp assembly disposed between afirst display area and a second display area, for providing a firstlight and a fifth lights between the first and second display areas, thefirst and fifth lights having a path different to each other; a firstlight guide plate having a first light incident surface for changing thefirst light into a second light, a first surface for reflecting aportion of the second light to the first display area as a third lightand a second surface for emitting the third light, the second surfacebeing faced to the first surface; a second light guide plate having asecond light incident surface for changing the fifth light into a sixthlight, a third surface for reflecting a portion of the sixth light tothe second display area as a seventh light and a fourth surface foremitting the seventh light, the fourth surface being faced to the thirdsurface; and a reflecting plate disposed between the first and thirdsurfaces, for reflecting a remained portion of the second light leakedfrom the first surface to the first display area as a fourth light andreflecting a remained portion of the fifth light leaked from the thirdsurface to the second display area as an eighth light.

In further aspect, there is provided an LCD apparatus comprising: a lampassembly disposed between a first display area and a second displayarea, for providing a first light between the first and second displayareas; a light guide plate having a light incident surface for changingthe first light into a second light, a first light emitting surface foremitting a portion of the second light to the first display area as athird light and a second light emitting surface for emitting a remainedportion of the second light to the second display area as a fourthlight; a brightness control part for reflecting a portion of the fourthlight to the first display area and transmitting a remained portion ofthe fourth light to the second display area, so that a first brightnessat the first display area and a second brightness at the second displayarea have a predetermined brightness ratio, respectively; a first LCDpanel assembly for changing the portions of the third and fourth lightsinto a first display light having an image information; and a second LCDpanel assembly for changing the remained portion of the fourth lightinto a second display light having an image information.

In still another aspect, there is provided an LCD apparatus comprising:a lamp assembly disposed between a first display area and a seconddisplay area, for providing a first light and a fifth lights between thefirst and second display areas, the first and fifth lights having a pathdifferent to each other; a first light guide plate having a first lightincident surface for changing the first into a second light, a firstsurface for reflecting a portion of the second light to the firstdisplay area as a third light and transmitting a remained portion of thesecond light to the second display area as a fourth light, and a secondsurface facing to the first surface, for emitting the third light; asecond light guide plate having a second light incident surface forchanging the fifth light into a sixth light, a third surface forreflecting a portion of the sixth light to the second display area as aseventh light and transmitting a remained portion of the sixth light tothe first display area as a eighth light, and a fourth surface facing tothe third surface, for emitting the seventh light; a reflecting platedisposed between the first and third surfaces, for reflecting a remainedportion of the second light leaked from the first surface to the firstdisplay area as a fourth light and reflecting a remained portion of thefifth light leaked from the third surface to the second display area asan eighth light; a first LCD panel assembly for generating a firstdisplay light having an image information using the third and fourthlights; and a second LCD panel assembly for generating a second displaylight having an image information using the seventh and eight lights.

According to the backlight assembly for the LCD apparatus, the lightfrom the light source is divided into a light for the first display areaand a light for the second display area of the LCD apparatus. Theportion of the light provided to the second display area is reflected tothe first display area and the remained portion of the light provided tothe second display area is transmitted, thereby controlling thebrightness ratio at the first and second display areas. Thus, it is ableto display a required image in the two directions.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other advantages of the present invention will becomereadily apparent by reference to the following detailed description whenconsidered in conjunction with the accompanying drawings wherein:

FIG. 1 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a first embodiment of the presentinvention;

FIG. 2 is a schematic diagram showing a light reflecting patterndisposed on a light guide plate of the backlight assembly shown in FIG.1;

FIG. 3 is a schematic diagram showing a size and an arrangement of thelight reflecting pattern shown in FIG. 2;

FIG. 4 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a second embodiment of thepresent invention;

FIG. 5 is a graph showing brightness at a first display area and asecond display area of the backlight assembly according to the presentinvention;

FIG. 6 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a third embodiment of the presentinvention;

FIG. 7 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a fourth embodiment of thepresent invention;

FIG. 8 is a schematic diagram showing a light reflecting patterndisposed on a light guide plate shown in FIG. 7;

FIG. 9 is a schematic diagram showing optical sheets disposed on thebacklight assembly shown in FIG. 8;

FIG. 10 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a fifth embodiment of the presentinvention;

FIG. 11 is a graph showing a size of the light reflecting pattern shownin FIG. 10;

FIG. 12 is a graph showing differences of the size between a first lightreflecting pad and a second light reflecting pad shown in FIG. 10;

FIG. 13 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a sixth embodiment of the presentinvention;

FIG. 14 is a schematic diagram showing optical sheets disposed on thebacklight assembly shown in FIG. 13;

FIG. 15 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a seventh embodiment of thepresent invention;

FIG. 16 is a graph showing a size of the light reflecting pattern shownin FIG. 15;

FIG. 17 is a graph showing differences of the size between a first lightreflecting pad and a second light reflecting pad shown in FIG. 15;

FIG. 18 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a eighth embodiment of thepresent invention;

FIG. 19 is a schematic diagram showing an LCD apparatus according to afirst embodiment of the present invention;

FIGS. 20 to 23 are schematic diagrams showing sizes and locations of afirst LCD panel assembly and a second LCD panel assembly shown in FIG.19;

FIGS. 24 and 25 are schematic diagrams showing driving methods of thefirst and second LCD panel assemblies shown in FIG. 19;

FIG. 26 is a schematic diagram showing an LCD apparatus according to asecond embodiment of the present invention; and

FIG. 27 is a schematic diagram showing sizes and locations of a firstLCD panel assembly and a second LCD panel assembly shown in FIG. 26.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a first embodiment of the presentinvention.

Referring to FIG. 1, a backlight assembly 500 includes a light guideplate 300 and a brightness control member 400. The light guide plate 300has a rectangular parallelepiped shape and is disposed between a firstdisplay area 100 and a second display area 200. The light guide plate300 includes four side surfaces including a light incident surface 310,a first light emitting surface 320 and a second light emitting surface330.

Particularly, the first and second light emitting surfaces 320 and 330are facing to each other and have a rectangular shape, respectively. Thefirst light emitting surface 320 is connected to the second lightemitting surface 320 by means of four side surfaces including the lightincident surface 310, which are perpendicular to the first and secondlight emitting surfaces 320 and 330.

The light incident surface 310 of the light guide plate 300 receives afirst light 305 from an external. The first light 305 is emitted from apoint light source such as a light emitting diode or a linear lightsource such as a CCFL. The light source that emits the first light hasbeen indicated by a reference numeral “301”.

The first light 305 is changed into a second light 315 during passingthrough the light incident surface 310 having a medium different to anair between the light source 301 and the light incident surface 310. Thesecond light 315 is reflected inside the light guide plate 300 accordingto the refraction's law and emitted from the light guide plate 300 totwo directions. A light corresponding to a portion of the second light315 is emitted from the first light surface 320 to the first displayarea 100. The light emitted from the first light surface 320 to thefirst display area 100 is defined as a third light 325.

A light corresponding to a remained portion of the second light 315 isemitted from the second light emitting surface 330 to the second displayarea 200. The light emitted from the second light emitting surface 330and provided to the second display area 200 is defined as a fourth light335.

Accordingly, it is possible to supply the first light 305 to the firstand second display areas 100 and 200 using the light guide plate 300.

However, it is difficult to control a first brightness at the firstdisplay area and a second brightness at the second display area usingonly the light guide plate 300. In order to control the first and secondbrightness, the light guide plate 300 has to be re-designed andre-manufactured.

In the present invention, the brightness control member 400 controls thefirst and second brightness at the first and second display areas 100and 200. The brightness control member 400 reflects a portion of thefourth light 335 to the first display area 100 and transmits a remainedportion of the fourth light 335 to the second display area 200.

The brightness control member 400 has a sheet shape or a plate shapecomprised of a PET (Polyethylene Terephthalate) resin. The brightnesscontrol member 400 may be fabricated to reflect the light of about 80%of the fourth light 335 and transmit the light of about 20% of thefourth light 335 or to reflect the light of about 20% of the fourthlight 335 and transmit the light of about 80% of the fourth light 335.The brightness control member 400 may be fabricated using a material forpartially reflecting and transmitting a light.

FIG. 2 is a schematic diagram showing a light reflecting patterndisposed on a light guide plate of the backlight assembly shown in FIG.1 and FIG. 3 is a schematic diagram showing a size and an arrangement ofthe light reflecting pattern shown in FIG. 2.

Referring to FIGS. 2 and 3, the light guide plate 300 includes aplurality of light reflecting pads 331 disposed on the second lightemitting surface 330 facing the brightness control member 400. The lightreflecting pads 331 reflect a portion of the second light 315, which isin contact with the second light emitting surface 330, to the firstlight emitting surface 320.

The light reflecting pads 331 are disposed on the second light emittingsurface 320 in a matrix configuration. The light reflecting pads 331 areformed on the second light emitting surface 320 using a silk screenmethod. Plane Sizes of the light reflecting pads 331 become largeraccording as the light reflecting pads 331 are spaced more apart fromthe light incident surface 310. Changing the plane sizes of the lightreflecting pads 331 is for uniformly maintaining a reflecting amount ofthe fourth light 335 by the light reflecting pads 331 disposed over thesecond light emitting surface 330.

As shown in FIG. 2, the first light emitting surface 320 is parallel tothe second light emitting surface 330.

FIG. 4 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a second embodiment of thepresent invention. FIG. 5 is a graph showing brightness at a firstdisplay area and a second display area of the backlight assemblyaccording to the present invention. FIG. 6 is a schematic diagramshowing a backlight assembly for emitting a light in two directionsaccording to a third embodiment of the present invention.

Referring to FIG. 4, the first light emitting surface 320 is notparallel to the second light emitting surface 330. Particularly, athickness between the first and second light emitting surfaces 320 and322 is thickest at the light incident surface 310 and gradually becomesthinner according as the first and second light emitting surfaces 320and 322 become more distant from the light incident surface 310.

Referring to FIG. 5, the first brightness at the first display area 100is higher than the second brightness at the second display area 200. Inorder to obtain the result that the first brightness is higher than thesecond brightness, the brightness control member 400 has to becontrolled to have a light reflectance higher than a light transmittancewith respect to the fourth light 335. Similarly, in order to obtain aresult that the second brightness at the second display area 200 ishigher than the first brightness at the first display area 100, thebrightness control member 400 has to be controlled to have a lighttransmittance higher than a light reflectance with respect to the fourthlight 335.

As shown in FIG. 6, in order to enhance optical properties of the lightguide plate 300, an optical sheet 340 may be disposed on the first lightemitting surface 320 of the light guide plate 300.

The optical sheet 340 includes a diffusion sheet 342 and a prism sheet344. The diffusion sheet 342 diffuses the third light 325 and theportion of the fourth light 355 reflected from the brightness controlmember 400 to provide a light having a uniform brightness to the firstdisplay area 100.

The prism sheet 344 disposed on the diffusion sheet 342 controls adirection of the light emitted through the diffusion sheet 342 toprovide the light having an improved visual angle. Particularly, theprism sheet 344 includes a body portion 344 a having a plate shape and abrightness enhancing portion 344 b for enhancing the brightness, whichis disposed on a surface facing to the first light emitting surface 320.The brightness enhancing portion 344 b is successively disposed on thebody portion 344 a and protruded from the body portion 344 a to have atriangle shape in section.

FIG. 7 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a fourth embodiment of thepresent invention.

Referring to FIG. 7, a backlight assembly 1000 includes a first lightguide plate 700, a second light guide plate 800, a lamp assembly 940 anda brightness control member 900.

The lamp assembly 940 includes a lamp 950 and a lamp reflector 930. Thelamp 950 may include an LED as a point light source or a CCFL as alinear light source. A light incident to the first light guide plate 700from the light source is defined as a first light 952 and a lightincident to the second light guide plate 800 from the light source isdefined as a fifth light 956.

The lamp reflector 930 reflects the light emitted from the lamp 950 in aradial shape to provide the light to the directions to which the firstand fifth lights 952 and 956 are provided. The lamp reflector 930includes first and second side surfaces 932 and 934 and a connectingside surface 936 that connects the first side surface 932 to the secondside surface 934. The first and second side surfaces 932 and 934 and theconnecting side surface 936 have a reflectance higher than that of outersurfaces thereof. The first and second light guide plates 700 and 800are disposed between the first and second side surfaces 932 and 934.

The first light guide plate 700 has a rectangular parallelepiped shapeand is disposed between a first display area 100 and a second displayarea 200. The first light guide plate 700 includes four side surfacesincluding a first light incident surface 710, a first surface 720 and asecond surface 730.

The first and second surfaces 720 and 730 have the rectangularparallelepiped shape, respectively. The first and second surfaces 720and 730 are connected to each other by means of the four side surfaces.

The first light incident surface 710 of the first light guide plate 700receives the first light 952 from the lamp 950. The first light 952 ischanged into a second light 953 during passing through the first lightincident surface 710. The first surface 720 reflects a portion of thesecond light 953 satisfied with a reflection condition according to therefraction's law to the first display area 100. A remained portion ofthe second light 953 not satisfied with the reflection condition of therefraction's law is leaked to the second display area 200.

Hereinafter, the portion of the second light 953 reflected to the firstdisplay area 100 is defined as a third light 954 and the remainedportion of the second light 953 transmitted to the second display area200 is defined as a fourth light 955.

The second light guide plate 800 has a rectangular parallelepiped shape.The second light guide plate 800 is disposed between a first displayarea 100 and a second display area 200 and adjacent to the first surface720 of the light guide plate 700. Also, the first and second light guideplates 700 and 800 are parallel to each other. The second light guideplate 800 includes four side surfaces including a second light incidentsurface 810, a third surface 820 and a fourth surface 830. The four sidesurfaces connect the third side surface 820 to the fourth surfaces 820and 830 of the second light guide plate 800. The fourth surface 830 hasa shape same to that of the third surface 820.

The second light incident surface 810 of the light guide plate 800receives the fifth light 956 from the lamp 950. The fifth light 956 ischanged into a sixth light 957 during passing through the second lightincident surface 810. The third surface 820 reflects a portion of thesixth light 957 satisfied with the reflection condition of therefraction's law to the second display area 200. A remained portion ofthe sixth light 957 not satisfied with the reflection condition of therefraction's law is leaked to the second display area 200.

Hereinafter, the portion of the sixth light 957 reflected to the seconddisplay area 200 is defined as a seventh light 958 and the remainedportion of the sixth light 957 transmitted to the first display area 100is defined as a eighth light 959.

The brightness control member 900, that is a reflecting plate 900 isdisposed between the first and second light guide plates 700 and 800.The reflecting plate 900 has a sheet shape or a plate shape comprised ofa PET resin. The reflecting plate 900 reflects the fourth light 955leaked from the first surface 720 of the first light guide plate 700 tothe first display area 100 and reflects the eighth light 959 leaked fromthe third surface 820 of the light guide plate 800 to the second displayarea 200.

Hereinafter, operations of the backlight assembly 1000 will be describedwith reference to FIG. 7.

The first and fifth lights 952 and 956 emitted from the lamp 950 of thelamp assembly 940 are input to the first and second light incidentsurfaces 710 and 810 of the first and second light guide plate 700 and800, respectively. The first light 952 is changed into the second light953.

The portion of the second light 953, which is satisfied with thereflection condition of the refraction's law, is reflected by the firstsurface 720 and provided to the first display area 100 through thesecond surface 730 as the third light 954. The remained portion of thesecond light 953, which is satisfied with the transmittal condition ofthe refraction's law, is supplied to the second display area 100 throughthe first surface 720 as the fourth light 955.

The fifth light 956 emitted from the lamp, 950 of the lamp assembly 940is changed into the sixth light 957. The portion of the sixth light 957,which is satisfied with the reflection condition of the refraction'slaw, is reflected by the third surface 820 and provided to the seconddisplay area 200 through the fourth surface 830 as the seventh light958. The remained portion of the sixth light 957, which is not satisfiedwith the reflection condition of the refraction's law, is supplied tothe first display area 100 through the third surface 820 as the eighthlight 959.

The third and seventh lights 954 and 958 are provided to the first andsecond display areas 100 and 200 through the first and second lightguide plates 700 and 800. The fourth and eighth lights 954 and 959 areleaked into the first and second light guide plates 700 and 800.

The fourth and eighth lights 955 and 959 are reflected form thereflecting plate 900 to provide the fourth and eighth lights 955 and 959to the first and second display areas 100 and 200, respectively.

In the backlight assembly 1000, the first surface 720 of the first lightguide plate 700 is parallel to the second surface 730 thereof and thethird surface 820 of the second light guide plate 800 is parallel to thefourth surface 830. Also, the first light guide plate 700 has a sizesame to that of the second light guide plate 800.

FIG. 8 is a schematic diagram showing a light reflecting patterndisposed on a light guide plate shown in FIG. 7. FIG. 9 is a schematicdiagram showing optical sheets disposed on the backlight assembly shownin FIG. 8.

As shown in FIG. 8, the first light guide plate 700 includes a pluralityof first light reflecting pads 721 disposed on the first surface 720thereof and the second light guide plate 800 includes a plurality ofsecond light reflecting pads 821 disposed on the third surface 820thereof. The first and second light reflecting pads 721 and 821 aredisposed in the matrix configuration.

Sizes of the first and second light reflecting pads 721 and 821 becomelarger according as the first and second light reflecting pads 721 and821 are spaced more apart from the first and second light incidentsurface 710 and 810, respectively.

The backlight assembly 1000 shown in FIG. 7 may further include a firstoptical sheet 740 and a second optical sheet 840 as shown in FIG. 9.

Referring to FIG. 9, the first optical sheet 740 is disposed between thefirst display area 100 and the first light guide plate 700 and faces thesecond surface 730 of the first light guide plate 700.

The first optical sheet 740 includes a body portion 742 having a plateshape and a brightness enhancing portion 744 for enhancing thebrightness, which is disposed on a surface facing to the first surface720. The brightness enhancing portion 744 is successively disposed onthe body portion 742 and protruded from the body portion 742 to have atriangle shape in section.

The second optical sheet 840 is disposed between the second display area200 and the second light guide plate 800 and faces the fourth surface830 of the second light guide plate 800.

The second optical sheet 840 includes a body portion 842 having a plateshape and a brightness enhancing portion 844 for enhancing thebrightness, which is disposed on a surface facing to the fourth surface830. The brightness enhancing portion 844 is successively disposed onthe body portion 842 and protruded from the body portion 842 to have atriangle shape in section.

The first optical sheet 740 enhances optical properties such as a visualangle and a brightness distribution, etc., of the third light 954 andthe portion of the eighth light 959. The second optical sheet 840enhances optical properties such as the visual angle and the brightnessdistribution, etc., of the seventh light 958 and the portion of thefourth light 955.

FIG. 10 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a fifth embodiment of the presentinvention. FIG. 11 is a graph showing a size of the light reflectingpattern shown in FIG. 10. FIG. 12 is a graph showing differences of thesize between a first light reflecting pad and a second light reflectingpad shown in FIG. 10.

Referring to FIG. 10, the first and second light guide plates 700 and800 may be formed to have sizes different to each other. In FIG. 10, thefirst light guide plate 700 has a size greater than that of the secondlight guide plate 800.

The first light guide plate 700 includes a first light reflecting pad725 disposed on the first surface 720 thereof and the second light guideplate 800 includes a second light reflecting pad 825 disposed on thethird surface 820 thereof Where the size of the first light guide plate700 is greater than that of the second light guide plate 800, the firstlight reflecting pad 725 disposed on the first surface 720 has a patterndifferent to that of the second light reflecting pad 825 disposed on thethird surface 820.

As shown in FIG. 11, sizes of the first and second light reflecting pads725 and 825 become larger according as the first and second lightreflecting pads 725 and 825 are spaced more apart from the first andsecond light incident surface 710 and 810, respectively. The size of thefirst light reflecting pad 725 is not same to that of the second lightreflecting pad 825.

Referring to FIG. 12, a rate of change of the size of the second lightreflecting pad 825 based on a distance between the second light incidentsurface 810 and the second light reflecting pad 825 is greater than thatof the first light reflecting pad 725 based on a distance between thefirst light incident surface 710 and the first light reflecting pad 725.In FIG. 12, a graph indicated by a reference “a” shows the rate ofchange of the size of the first light reflecting pad 725 and a graphindicated by a reference “b” shows the rate of change of the size of thesecond light reflecting pad 825.

When the sizes of the first and second light reflecting pads 725 and 825are measured at a position spaced apart from the first and second lightincident surface 710 and 810 by a reference “A”, the first lightreflecting pad 725 has a size “B” and the second light reflecting pad825 has a size “C” greater than the size “B”.

FIG. 13 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a sixth embodiment of the presentinvention. FIG. 14 is a schematic diagram showing optical sheetsdisposed on the backlight assembly shown in FIG. 13.

Referring to FIG. 13, the first and second light guide plates 700 and800 of the backlight assembly 1000 may have a wedge shape. A thicknessbetween the first and second surfaces 720 and 730 of the first lightguide plate 700 is thickest at the first light incident surface 710 andgradually becomes thinner according as the first and second surfaces 720and 730 become more distant from the first light incident surface 710.That is, the first surface 720 is inclined toward the second surface730. A thickness between the third and fourth surfaces 820 and 830 ofthe second light guide plate 800 gradually becomes thinner according asthe first and second surfaces 820 and 830 become more close to thesecond light incident surface 810. That is, the third surface 820 isinclined toward the fourth surface 830 and is parallel to the firstsurface 720. Also, the first surface 720 of the first light guide plate700 is parallel to the fourth surface 830 of the second light guideplate 800.

The first light guide plate 700 includes a first light reflecting pad721 disposed on the first surface 720 thereof and the second light guideplate 800 includes a second light reflecting pad 821 disposed on thethird surface 820 thereof Sizes of the first and second light reflectingpads 721 and 821 become larger according as the first and second lightreflecting pads 721 and 821 are spaced more apart from the first andsecond light incident surface 710 and 810, respectively.

The backlight assembly 1000 shown in FIG. 13 may further include a firstoptical sheet 740 and a second optical sheet 840 as shown in FIG. 14.

Referring to FIG. 14, the first optical sheet 740 is disposed betweenthe first display area 100 and the first light guide plate 700 and facesthe second surface 730 of the first light guide plate 700.

The first optical sheet 750 includes a body portion 752 having a plateshape and a brightness enhancing portion 754 for enhancing thebrightness, which is disposed on a surface facing to the first surface720. The brightness enhancing portion 754 is successively disposed onthe body portion 752 and protruded from the body portion 752 to have atriangle shape in section.

The second optical sheet 840 is disposed between the second display area200 and the second light guide plate 800 and faces the fourth surface830 of the second light guide plate 800.

The second optical sheet 850 includes a body portion 852 having a plateshape and a brightness enhancing portion 854 for enhancing thebrightness, which is disposed on a surface facing to the fourth surface830. The brightness enhancing portion 854 is successively disposed onthe body portion 852 and protruded from the body portion 852 to have atriangle shape in section.

The first optical sheet 740 enhances optical properties such as a visualangle and a brightness distribution, etc., of the third light 954 andthe portion of the eighth light 959. The second optical sheet 840enhances optical properties such as the visual angle and the brightnessdistribution, etc., of the seventh light 958 and the portion of thefourth light 955.

FIG. 15 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to a seventh embodiment of thepresent invention. FIG. 16 is a graph showing a size of the lightreflecting pattern shown in FIG. 15. FIG. 17 is a graph showingdifferences of the size between a first light reflecting pad and asecond light reflecting pad shown in FIG. 15.

Referring to FIG. 15, the first and second light guide plates 700 and800 may be formed to have sizes different to each other. In FIG. 15, thefirst light guide plate 700 has a size greater than that of the secondlight guide plate 800.

The first light guide plate 700 includes a first light reflecting pad721 disposed on the first surface 720 thereof and the second light guideplate 800 includes a second light reflecting pad 822 disposed on thethird surface 820 thereof Where the size of the first light guide plate700 is greater than that of the second light guide plate 800, the firstlight reflecting pad 721 disposed on the first surface 720 has a patterndifferent to that of the second light reflecting pad 822 disposed on thethird surface 820.

As shown in FIG. 16, sizes of the first and second light reflecting pads721 and 822 become larger according as the first and second lightreflecting pads 721 and 822 are spaced more apart from the first andsecond light incident surface 710 and 810, respectively. The size of thefirst light reflecting pad 721 is not same to that of the second lightreflecting pad 822.

Referring to FIG. 17, a rate of change of the size of the second lightreflecting pad 822 based on a distance between the second light incidentsurface 810 and the second light reflecting pad 822 is greater than thatof the first light reflecting pad 721 based on a distance between thefirst light incident surface 710 and the first light reflecting pad 721.In FIG. 17, a graph indicated by a reference “a” shows the rate ofchange of the size of the first light reflecting pad 721 and a graphindicated by a reference “b” shows the rate of change of the size of thesecond light reflecting pad 822.

When the sizes of the first and second light reflecting pads 721 and 822are measured at a position spaced apart from the first and second lightincident surface 710 and 810 by a reference “A”, the first lightreflecting pad 721 has a size “E” and the second light reflecting pad822 has a size “F” greater than the size “E”.

FIG. 18 is a schematic diagram showing a backlight assembly for emittinga light in two directions according to an eighth embodiment of thepresent invention.

Referring to FIG. 18, the backlight assembly 1000 may further include afirst optical sheet 760 and a second optical sheet 860.

The first optical sheet 760 is disposed between the first display area100 and the first light guide plate 700 and faces the second surface730.

The first optical sheet 760 includes a body portion 762 having a plateshape and a brightness enhancing portion 764 for enhancing thebrightness, which is disposed on a surface facing to the first surface720. The brightness enhancing portion 764 is successively disposed onthe body portion 762 and protruded from the body portion 762 to have atriangle shape in section.

The second optical sheet 860 is disposed between the second display area200 and the second light guide plate 800 and faces the fourth surface830.

The second optical sheet 760 includes a body portion 762 having a plateshape and a brightness enhancing portion 764 for enhancing thebrightness, which is disposed on a surface facing to the first surface720. The brightness enhancing portion 764 is successively disposed onthe body portion 762 and protruded from the body portion 762 to have atriangle shape in section.

FIG. 19 is a schematic diagram showing an LCD apparatus according to afirst embodiment of the present invention. FIGS. 20 to 23 are schematicdiagrams showing sizes and locations of a first LCD panel assembly and asecond LCD panel assembly shown in FIG. 19.

Referring to FIG. 19, an LCD apparatus 1300 includes a first LCD panelassembly 100, a second LCD panel assembly 1200 and the backlightassembly 500 shown in FIG. 1.

The first LCD panel assembly 1100 is disposed on the first display area100. The first LCD panel assembly 1100 receives the third light 325emitted from the first light emitting surface 320 and the portion of thefourth light 335 reflected from the brightness control member 400 andemits a first display light 1110 having image information.

The second LCD panel assembly 1200 is disposed on the second displayarea 200. The second LCD panel assembly 1200 receives a light passedthrough the brightness control member 400 of the fourth light 335emitted from the second light emitting surface 330 and emits a seconddisplay light 1210 having image information.

The first and second LCD panel assemblies 1100 and 1200 have a firstdisplay area and a second display area, respectively. The first andsecond display areas are same to each other.

Further, the first LCD panel assembly 1100 may have a first display areadifferent to the second display area of a second LCD panel assembly 1250as shown in FIG. 20.

Referring to FIG. 20, the first display area of the first LCD panelassembly 1100 is greater than the second display area of the second LCDpanel assembly 1250.

Where the second display area of the second LCD panel assembly 1250 issmaller than the first display area of the first LCD panel assembly1100, a driving module may be disposed at a surplus space of the secondLCD panel assembly 1250. Therefore, the volume of the second LCD panelassembly 1250 may be reduced.

As shown in FIG. 4, when the second light emitting surface 332 of thelight guide plate 300 is inclined, the second LCD panel assembly 1250may be disposed parallel to the second light emitting surface 332. Thus,it is able to reduce the thickness of the LCD apparatus in total.

Where the first LCD panel assembly 1100 is greater than the second LCDpanel assembly 120, optical properties of the second LCD panel assembly1250 depend on a position of the second LCD panel assembly 1250.

In FIG. 21, a reference numeral 1252 indicates a first end portion ofthe second LCD panel assembly 1250 and a reference numeral 1254indicates a second end portion opposite to the first end portion.

The first end portion 1252 of the second LCD panel assembly 1250 isaligned to the light incident surface 310 of the light guide plate 300.Where the first end portion 1252 is aligned to the light incidentsurface 310, the second LCD panel assembly 1250 may obtain a lot oflight than where the first end portion 1252 is not aligned to the lightincident surface 310. Also, the second LCD panel assembly 1250 may bedisposed at a center portion with respect to the second light emittingsurface 330 as shown in FIG. 21. Further, the second end portion 1254 ofthe second LCD panel assembly 1250 may be aligned to an end portion 410of the brightness control member 400.

FIGS. 24 and 25 are schematic diagrams showing driving methods of thefirst and second LCD panel assemblies shown in FIG. 19.

Referring to FIG. 24, at least one of the first and second LCD panelassemblies 1100 and 1200 shown in FIG. 19 may be operated by a passivematrix method without using a thin film transistor. The passive matrixmethod is a manner that generates an electric field for controlling theliquid crystal using a driving signal applying part 1300 after injectinga liquid crystal between a first electrode 1310 and a second electrode1320 intersected with the first electrode 1310.

Since the first LCD panel assembly 1100 is operated by the drivingsignal applying part 1300 same to that for operating the second LCDpanel assembly 1200, the first LCD panel assembly 1100 displays an imagesame to that displayed through the second LCD panel assembly 1200.

On the contrary, the first and second LCD panel assemblies 1100 and 1200may include a first driving module for generating a first driving signaland a second driving module for generating a second driving signal,respectively. In this case, the first LCD panel assembly 1100 displays afirst image and the second LCD panel assembly 1200 displays a secondimage.

As shown in FIG. 25, at least one of the first and second LCD panelassemblies 1100 and 1200 shown in FIG. 19 may be operated by an activematrix method. The active matrix method is a manner that uses a thinfilm transistor 1400 and a pixel electrode 1450 receiving a power fromthe thin film transistor 1400 and generates an electric field forcontrolling the liquid crystal using a driving signal applying part1470.

Since the first LCD panel assembly 1100 is operated by the drivingsignal applying part 1470 same to that for operating the second LCDpanel assembly 1200, the first LCD panel assembly 1100 displays an imagesame to that displayed through the second LCD panel assembly 1200.

On the contrary, the first and second LCD panel assemblies 1100 and 1200may include a first driving module for generating a first driving signaland a second driving module for generating a second driving signal,respectively. In this case, the first LCD panel assembly 1100 displays afirst image and the second LCD panel assembly 1200 displays a secondimage.

FIG. 26 is a schematic diagram showing an LCD apparatus according to asecond embodiment of the present invention. FIG. 27 is a schematicdiagram showing sizes and locations of a first LCD panel assembly and asecond LCD panel assembly shown in FIG. 26.

Referring to FIG. 26, an LCD apparatus 1700 includes a first LCD panelassembly 1500, a second LCD panel assembly 1600 and the backlightassembly 1000 shown in FIG. 7.

The first LCD panel assembly 1500 is disposed on the first display area100. The first LCD panel assembly 1500 receives the third light 954emitted from the second surface 730 and the portion of the fourth light955 reflected from the brightness control member 900 and emits a firstdisplay light 1510 having image information.

The second LCD panel assembly 1600 is disposed on the second displayarea 200. The second LCD panel assembly 1600 receives a light passedthrough the brightness control member 900 of the eighth light 959emitted from the third surface 830 and emits a second display light 1610having image information.

The first and second LCD panel assemblies 1500 and 1600 have a firstdisplay area and a second display area, respectively. The first andsecond display areas are same to each other.

Further, the first LCD panel assembly 1500 may have a first display areadifferent to the second display area of a second LCD panel assembly 1600as shown in FIG. 27.

Referring to FIG. 27, the first display area of the first LCD panelassembly 1500 is greater than the second display area of the second LCDpanel assembly 1600. Where the first LCD panel assembly 1500 is greaterthan the second LCD panel assembly 1600, optical properties of thesecond LCD panel assembly 1600 depend on a position of the second LCDpanel assembly 1600.

In FIG. 27, a reference numeral 1620 indicates a first end portion ofthe second LCD panel assembly 1600 and a reference numeral 1640indicates a second end portion opposite to the first end portion.

The first end portion 1620 of the second LCD panel assembly 1600 isaligned to the light incident surface 810 of the second light guideplate 800. Where the first end portion 1620 is aligned to the lightincident surface 810, the second LCD panel assembly 1600 may obtain alot of light than where the first end portion 1620 is not aligned to thelight incident surface 810. Also, the second LCD panel assembly 1600 maybe disposed at a center portion with respect to the second lightemitting surface 830 as shown in FIG. 27. Further, the second endportion 1640 of the second LCD panel assembly 1600 may be aligned to anend portion 910 of the brightness control member 900.

At least one of the first and second LCD panel assemblies 1500 and 1600shown in FIG. 26 may be operated by a passive matrix method withoutusing a thin film transistor. The passive matrix method is a manner thatgenerates an electric field for controlling the liquid crystal using adriving signal applying part 1300 after injecting a liquid crystalbetween a first electrode 1310 and a second electrode 1320 intersectedwith the first electrode 1310.

Since the first LCD panel assembly 1500 is operated by the drivingsignal applying part 1300 same to that for operating the second LCDpanel assembly 1200, the first LCD panel assembly 1500 displays an imagesame to that displayed through the second LCD panel assembly 1600.

On the contrary, the first and second LCD panel assemblies 1500 and 1600may include a first driving module for generating a first driving signaland a second driving module for generating a second driving signal,respectively. In this case, the first LCD panel assembly 1500 displays afirst image and the second LCD panel assembly 1600 displays a secondimage.

At least one of the first and second LCD panel assemblies 1500 and 1600shown in FIG. 26 may be operated by an active matrix method. The activematrix method is a manner that uses a thin film transistor 1400 and apixel electrode 1450 receiving a power from the thin film transistor1400 and generates an electric field for controlling the liquid crystalusing a driving signal applying part 1470.

Since the first LCD panel assembly 1500 is operated by the drivingsignal applying part 1470 same to that for operating the second LCDpanel assembly 1600, the first LCD panel assembly 1500 displays an imagesame to that displayed through the second LCD panel assembly 1600.

On the contrary, the first and second LCD panel assemblies 1500 and 1600may include a first driving module for generating a first driving signaland a second driving module for generating a second driving signal,respectively. In this case, the first LCD panel assembly 1500 displays afirst image and the second LCD panel assembly 1600 displays a secondimage.

According to the present invention, the LCD apparatus may display imagesin the two directions, which are same to each other or different to eachother. Where the images are different to each other, the LCD apparatusmay display the images to have a first and a second brightness that aredifferent to each other, using the brightness control member. Thus, auser may obtain various images through the LCD apparatus.

Although the exemplary embodiments of the present invention have beendescribed, it is understood that the present invention should not belimited to these exemplary embodiments but various changes andmodifications can be made by one ordinary skilled in the art within thespirit and scope of the present invention as hereinafter claimed.

1. A backlight assembly for emitting a light in two directions,comprising: a light guide plate having a light incident surface forchanging a first light provided into a space between a first displayarea and a second display area into a second light, a first lightemitting surface for emitting a portion of the second light to the firstdisplay area as a third light and a second light emitting surface foremitting a remained portion of the second light to the second displayarea as a fourth light, the light guide plate being disposed between thefirst and second display areas; and a brightness control part forreflecting a portion of the fourth light to the first display area andtransmitting a remained portion of the fourth light to the seconddisplay area, so that a first brightness at the first display area and asecond brightness at the second display area have a predeterminedbrightness ratio, respectively.
 2. The backlight assembly of claim 1,wherein the second light emitting surface comprises at least one lightreflecting pad having a dot shape, for reflecting the second light tothe first display area and the light reflecting pad becomes largeraccording as the light reflecting pad is spaced more apart from thelight incident surface.
 3. The backlight assembly of claim 1, whereinthe first and second light emitting surfaces are parallel to each other.4. The backlight assembly of claim 1, wherein the light guide plate hasa wedge shape in which a thickness thereof becomes thinner as it is farfrom the light incident surface.
 5. The backlight assembly of claim 1,wherein the brightness control part comprises a sheet for reflecting andtransmitting a light.
 6. The backlight assembly of claim 1, wherein thefirst brightness is greater than the second brightness.
 7. The backlightassembly of claim 1, wherein the first light is emitted from a pointlight source such as a light emitting diode or a linear light sourcesuch as a CCFL.
 8. The backlight assembly of claim 1, further comprisingan optical sheet for increasing optical properties of the third light,the optical sheet being disposed adjacent to the first light emittingsurface.
 9. A backlight assembly for emitting a light in two directions,comprising: a lamp assembly disposed between a first display area and asecond display area, for providing a first light and a fifth lights intoa space between the first and second display areas, the first and fifthlights having a path different to each other; a first light guide platehaving a first light incident surface for changing the first light intoa second light, a first surface for reflecting a portion of the secondlight to the first display area as a third light and a second surfacefor emitting the third light, the second surface being faced to thefirst surface; a second light guide plate having a second light incidentsurface for changing the fifth light into a sixth light, a third surfacefor reflecting a portion of the sixth light to the second display areaas a seventh light and a fourth surface for emitting the seventh light,the fourth surface being faced to the third surface; and a reflectingplate disposed between the first and third surfaces, for reflecting aremained portion of the second light leaked from the first surface tothe first display area as a fourth light and reflecting a remainedportion of the fifth light leaked from the third surface to the seconddisplay area as an eighth light.
 10. The backlight assembly of claim 9,wherein the first and second surfaces are parallel to each other and thethird and fourth surfaces are parallel to each other.
 11. The backlightassembly of claim 10, wherein the first and third surfaces comprise afirst light reflecting pad and a second light reflecting pad having adot shape, respectively, the first and second light reflecting padsbecome larger according as the first and second light reflecting padsare spaced more apart from the first and second light incident surface.12. The backlight assembly of claim 10, further comprising a firstoptical sheet disposed at a place facing the first surface, forincreasing optical properties of the third light and a second opticalsheet disposed at a place facing the fourth surface, for increasingoptical properties of the seventh light.
 13. The backlight assembly ofclaim 10, wherein the first optical sheet comprises a first body portionhaving a plate shape and a first brightness enhancing protrusion portionprotruded from the first body portion facing to the second surface tohave a triangle shape in section, and the second optical sheet comprisesa second body portion having a plate shape and a second brightnessprotrusion portion protruded from the second body portion facing to thefourth surface to have a triangle shape in section.
 14. The backlightassembly of claim 10, wherein the first light guide plate has a planesize greater than that of the second light guide plate.
 15. Thebacklight assembly of claim 14, wherein the first and third surfacescomprise a first light reflecting pad and a second light reflecting padhaving a dot shape, respectively, the first and second light reflectingpads become larger according as the first and second light reflectingpads are spaced more apart from the first and second light incidentsurface, and a change rate of size of the second light reflecting pad isgreater than that of the first light reflecting pad.
 16. The backlightassembly of claim 9, wherein the first light guide plate has a thicknessthat becomes thinner as it is near to the first light incident surface,the second light guide plate has a thickness that becomes thinner as itis near to the second light incident surface and the second surface isparallel to the fourth surface.
 17. The backlight assembly of claim 16,wherein the first and third surfaces comprise a first light reflectingpad and a second light reflecting pad having a dot shape, respectively,the first and second light reflecting pads become larger according asthe first and second light reflecting pads are spaced more apart fromthe first and second light incident surface.
 18. The backlight assemblyof claim 16, wherein the first light guide plate has a plane sizegreater than that of the second light guide plate.
 19. The backlightassembly of claim 18, wherein the first and third surfaces comprise afirst light reflecting pad and a second light reflecting pad having adot shape, respectively, the first and second light reflecting padsbecome larger according as the first and second light reflecting padsare spaced more apart from the first and second light incident surface,and a change rate of size of the second light reflecting pad is greaterthan that of the first light reflecting pad.
 20. The backlight assemblyof claim 16, further comprising a first optical sheet disposed at aplace facing the second surface and a second optical sheet disposed at aplace facing the fourth surface.
 21. The backlight assembly of claim 20,wherein the first optical sheet comprises a first body portion having aplate shape and a first brightness enhancing protrusion portionprotruded from the first body portion facing to the second surface tohave a triangle shape in section, and the second optical sheet comprisesa second body portion having a plate shape and a second brightnessprotrusion portion protruded from the second body portion facing to thefourth surface to have a triangle shape in section.
 22. The backlightassembly of claim 9, wherein the lamp assembly comprises: a lamp forgenerating light in a radial shape; and a lamp reflector for changingthe light from the lamp into the first and fifth lights, the lampreflector being fixed to the second and fourth surfaces while receivingthe lamp therein.
 23. An LCD apparatus comprising: a lamp assemblydisposed between a first display area and a second display area, forproviding a first light into a space between the first and seconddisplay areas; a light guide plate having a light incident surface forchanging the first light into a second light, a first light emittingsurface for emitting a portion of the second light to the first displayarea as a third light and a second light emitting surface for emitting aremained portion of the second light to the second display area as afourth light; a brightness control part for reflecting a portion of thefourth light to the first display area and transmitting a remainedportion of the fourth light to the second display area, so that a firstbrightness at the first display area and a second brightness at thesecond display area have a predetermined brightness ratio, respectively;a first LCD panel assembly for changing the portions of the third andfourth lights into a first display light having an image information;and a second LCD panel assembly for changing the remained portion of thefourth light into a second display light having an image information.24. The LCD apparatus of claim 23, wherein the first LCD panel assemblyhas a first display area same to a second display area of the second LCDpanel assembly.
 25. The LCD apparatus of claim 23, wherein the first LCDpanel assembly has a first display area greater than a second displayarea of the second LCD panel assembly.
 26. The LCD apparatus of claim25, wherein a first end portion of the second LCD panel assembly isaligned to the light incident surface of the second light emittingsurface of the light guide plate.
 27. The LCD apparatus of claim 25,wherein the second LCD panel assembly is disposed at a center portion ofthe second light emitting surface of the light guide plate.
 28. The LCDapparatus of claim 25, wherein a second end portion of the second LCDpanel assembly is aligned to a side portion opposite to the lightincident surface of the second light emitting surface of the light guideplate.
 29. The LCD apparatus of claim 23, wherein at least one of thefirst and second LCD panel assemblies further comprise an active matrixLCD panel having a thin film transistor.
 30. The LCD apparatus of claim23, wherein at least one of the first and second LCD panel assembliesfurther comprise a passive matrix LCD panel.
 31. The LCD apparatus ofclaim 23, wherein the first and second LCD panel assemblies furthercomprise a driving module for displaying image information in responseto a driving signal, respectively.
 32. The LCD apparatus of claim 23,wherein the first LCD panel assembly further comprises a first drivingmodule for displaying a first information in response to a first drivingsignal and the second LCD panel assembly further comprises a seconddriving module for displaying a second information in response to asecond driving signal.
 33. The LCD apparatus of claim 23, wherein thebrightness control part comprises a sheet for reflecting andtransmitting a light.
 34. An LCD apparatus comprising: a lamp assemblydisposed between a first display area and a second display area, forproviding a first light and a fifth lights into a space between thefirst and second display areas, the first and fifth lights having a pathdifferent to each other; a first light guide plate having a first lightincident surface for changing the first into a second light, a firstsurface for reflecting a portion of the second light to the firstdisplay area as a third light and transmitting a remained portion of thesecond light to the second display area as a fourth light, and a secondsurface facing to the first surface, for emitting the third light; asecond light guide plate having a second light incident surface forchanging the fifth light into a sixth light, a third surface forreflecting a portion of the sixth light to the second display area as aseventh light and transmitting a remained portion of the sixth light tothe first display area as a eighth light, and a fourth surface facing tothe third surface, for emitting the seventh light; a reflecting platedisposed between the first and third surfaces, for reflecting a remainedportion of the second light leaked from the first surface to the firstdisplay area as a fourth light and reflecting a remained portion of thefifth light leaked from the third surface to the second display area asan eighth light; a first LCD panel assembly for generating a firstdisplay light having an image information using the third and fourthlights; and a second LCD panel assembly for generating a second displaylight having an image information using the seventh and eight lights.35. The LCD apparatus of claim 34, wherein the first LCD panel assemblyhas a first display area same to a second display area of the second LCDpanel assembly.
 36. The LCD apparatus of claim 34, wherein the first LCDpanel assembly has a first display area greater than a second displayarea of the second LCD panel assembly.
 37. The LCD apparatus of claim34, wherein a first end portion of the second LCD panel assembly isaligned to the light incident surface of the light guide plate.
 38. TheLCD apparatus of claim 34, wherein at least one of the first and secondLCD panel assemblies further comprises an active matrix LCD panel havinga thin film transistor.
 39. The LCD apparatus of claim 34, wherein atleast one of the first and second LCD panel assemblies further comprisesa passive matrix LCD panel.
 40. The LCD apparatus of claim 34, whereinthe first and second LCD panel assemblies further comprise a drivingmodule for displaying an image information in response to a drivingsignal, respectively.
 41. The LCD apparatus of claim 34, wherein thefirst LCD panel assembly further comprises a first driving module fordisplaying a first information in response to a first driving signal andthe second LCD panel assembly further comprises a second driving modulefor displaying a second information in response to a second drivingsignal.
 42. The LCD apparatus of claim 34, wherein the lamp assemblycomprises: a lamp for generating light in a radial shape; and a lampreflector for changing the light from the lamp into the first and fifthlights, the lamp reflector being fixed to the second and fourth surfaceswhile receiving the lamp therein.